org.apache.catalina.realm
Class MemoryRealm

java.lang.Object
  org.apache.catalina.util.LifecycleBase
      org.apache.catalina.util.LifecycleMBeanBase
          org.apache.catalina.realm.RealmBase
              org.apache.catalina.realm.MemoryRealm

All Implemented Interfaces:

MBeanRegistration, Lifecycle, Realm

Direct Known Subclasses:

JAASMemoryLoginModule

public class MemoryRealm
extends RealmBase

Simple implementation of Realm that reads an XML file to configure the valid users, passwords, and roles. The file format (and default file location) are identical to those currently supported by Tomcat 3.X.

IMPLEMENTATION NOTE: It is assumed that the in-memory collection representing our defined users (and their roles) is initialized at application startup and never modified again. Therefore, no thread synchronization is performed around accesses to the principals collection.

Version:

$Id: MemoryRealm.java 1026786 2010-10-24 13:08:26Z markt $

Author:

Craig R. McClanahan

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.catalina.realm.RealmBase

RealmBase.AllRolesMode

Field Summary

protected static String	info Descriptive information about this Realm implementation.
protected static String	name Descriptive information about this Realm implementation.

Fields inherited from class org.apache.catalina.realm.RealmBase

allRolesMode, container, containerLog, digest, digestEncoding, md, md5Encoder, md5Helper, realmPath, sm, stripRealmForGss, support, validate, x509UsernameRetriever, x509UsernameRetrieverClassName

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

mserver

Fields inherited from interface org.apache.catalina.Lifecycle

AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

MemoryRealm()

Method Summary

Principal	authenticate(String username, String credentials) Return the Principal associated with the specified username and credentials, if there is one; otherwise return null.
protected Digester	getDigester() Return a configured Digester to use for processing the XML input file, creating a new one if necessary.
String	getInfo() Return descriptive information about this Realm implementation and the corresponding version number, in the format <description>/<version>.
protected String	getName() Return a short name for this Realm implementation.
protected String	getPassword(String username) Return the password associated with the given principal's user name.
String	getPathname() Return the pathname of our XML file containing user definitions.
protected Principal	getPrincipal(String username) Return the Principal associated with the given user name.
protected Map<String,GenericPrincipal>	getPrincipals() Returns the principals for this realm.
void	setPathname(String pathname) Set the pathname of our XML file containing user definitions.
protected void	startInternal() Prepare for the beginning of active use of the public methods of this component and implement the requirements of LifecycleBase.startInternal().

Methods inherited from class org.apache.catalina.realm.RealmBase

addPropertyChangeListener, authenticate, authenticate, authenticate, backgroundProcess, digest, Digest, findSecurityConstraints, getAllRolesMode, getContainer, getDigest, getDigest, getDigestCharset, getDigestEncoding, getDomainInternal, getObjectNameKeyProperties, getPrincipal, getPrincipal, getRealmPath, getRealmSuffix, getServer, getValidate, getX509UsernameRetrieverClassName, hasMessageDigest, hasResourcePermission, hasRole, hasUserDataPermission, initInternal, isStripRealmForGss, main, removePropertyChangeListener, setAllRolesMode, setContainer, setDigest, setDigestEncoding, setRealmPath, setStripRealmForGss, setValidate, setX509UsernameRetrieverClassName, stopInternal, toString

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister

Methods inherited from class org.apache.catalina.util.LifecycleBase

addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

info

protected static final String info

Descriptive information about this Realm implementation.

See Also:

Constant Field Values

name

protected static final String name

Descriptive information about this Realm implementation.

See Also:

Constant Field Values

Constructor Detail

MemoryRealm

public MemoryRealm()

Method Detail

getInfo

public String getInfo()

Return descriptive information about this Realm implementation and the corresponding version number, in the format <description>/<version>.

Specified by:

getInfo in interface Realm

Overrides:

getInfo in class RealmBase

getPathname

public String getPathname()

Return the pathname of our XML file containing user definitions.

setPathname

public void setPathname(String pathname)

Set the pathname of our XML file containing user definitions. If a relative pathname is specified, it is resolved against "catalina.base".

Parameters:

pathname - The new pathname

authenticate

public Principal authenticate(String username,
                              String credentials)

Return the Principal associated with the specified username and credentials, if there is one; otherwise return null.

Specified by:

authenticate in interface Realm

Overrides:

authenticate in class RealmBase

Parameters:

username - Username of the Principal to look up

credentials - Password or other credentials to use in authenticating this username

getDigester

protected Digester getDigester()

Return a configured Digester to use for processing the XML input file, creating a new one if necessary.

getName

protected String getName()

Return a short name for this Realm implementation.

Specified by:

getName in class RealmBase

getPassword

protected String getPassword(String username)

Return the password associated with the given principal's user name.

Specified by:

getPassword in class RealmBase

getPrincipal

protected Principal getPrincipal(String username)

Return the Principal associated with the given user name.

Specified by:

getPrincipal in class RealmBase

getPrincipals

protected Map<String,GenericPrincipal> getPrincipals()

Returns the principals for this realm.

Returns:

The principals, keyed by user name (a String)

startInternal

protected void startInternal()
                      throws LifecycleException

Prepare for the beginning of active use of the public methods of this component and implement the requirements of LifecycleBase.startInternal().

Overrides:

startInternal in class RealmBase

Throws:

LifecycleException - if this component detects a fatal error that prevents this component from being used